Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by erkki67, Nov 1, 2019.
The CGS Hawk uses a curved tail boom. Not sure of the alloy.
Anyone know how they bent it?
I get that this might be a first sketch, but there are a number of things you should probably re-think. First, if the man is drawn to scale, he's not even going to be able to get a single butt-cheek onto that miniature chair. Which is way too far forward anyway.
The wing chord looks way too small, and why have all that structure behind the seat? Why not extend your structure rearwards and do away with the turtleback stuff altogether?
“Why not extend your structure rearwards and do away with the turtleback stuff altogether?”
Exactly what I was thinking. Bring a member down from the wing connection to the tail. It would massively reduce the demands on your structure. Only reason to use the low mounted skinny boom is for pusher prop clearance. Tractor prop, so no good reason to do as shown.
Thanks for that, learned something about 2024 that I did not know.
I have a book on pipe benders and how the amateur can make them.
So, maybe I better stick to steel for bending.
I hope others see your post because there is a lot of bent aluminum tube out there.
One is the enhanced Affordaplane, the other the Monotube, why not combining both into one design?
For a pusher you can’t get much simpler than this arrangement.
What kind of bird is this?
what about combining aluminum tubing for the the lower and upper longeron and having a bent steel tube for the engine mount and lower cockpit longeron.
All the fuzzy parts could be welded directly to the beam.
It is the basic frame of one of these, the enclosed pod is optional.
What the frame looks like
It looks like a moyes inspired craft.
Pretty sure thats rotax618's own boorabee design
Yes here are some of them at a fly-in in 2001.
More info on rotax618's Boorabee here https://www.recreationalflying.com/forums/topic/37905-boorabee/ and here http://all-aero.com/index.php/component/content/article/126-planes-c/18649-cadet-boorabee.
rotax618, how hard would it be to modify the Boorabee to a plans-built design, eliminating the difficult-to-source boom tube and going with a simpler builder-fabricated fabric-over-stringers enclosure?
The Boorabee is a very simple aircraft, I built several aircraft including a couple of Drifter like aircraft before I designed the Boorabee. The Drifters were great but after a days flying I would be sunburnt and windburnt, and enclosing a Drifter is not so simple.
I used the Drifter tube but shorter (made it easier to crush the front for footpegs and the rear for tailpost, did away with the unnecessary fuselarge pans.
I completely re-designed the wing to use fibreglass (later carbon and kevlar) ribs, a main spar consisting of 2 off 40mmx.6mmdrawn tube top and bottom chords with 1.6mm shear plates on either side between alternate ribs and a 44mm drawn tube trailing edge spar.
The wings incorporated 50litre fuel tanks moulded into eachwing root.
I could post a few more sketches if anyone is interested.
A friend of mine used the plug O made for the pod mould and built a similar aircraft called a Shuttle, he used a 100mmx75mmxapprox 2.5mm rectangular boom tube, he mig welded the foot pegs and rudder post. The Shuttles flew well but the aileron control system wasn't rigid enough and there were instances of aileron flutter, also he usea a single strut making the wing less torsionally strong.
The pod is non structural.
The plans were drawn over 20 years ago using Visual Cadd.
I don’t know how to upload PDFs and you can only upload 10 files at a time.
Very cool, thanks for sharing the drawings! As far as I know, it's just the "Upload a File" button but there is probably a file size limit.
Just like uploading a photo, drag the PDF to the post and drop it.
Nice airplane! Have you made a CAD model of it yet?
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